创建您自己的过滤器。

该过滤器应：

• 检查是否必须重写您的请求
• 如果是，则重写URL和URI
• 转发请求
• 它再次通过相同的过滤器到达，但先检查将传递错误
• 不要忘记，要小心打电话 chain.doFilter

转发不会更改浏览器中的任何URL。只需发送文件内容即可。

遵循代码可能是此类过滤器的实现。这不是任何干净的代码。只是快速而肮脏的工作代码：

@Component
public class SubdomainToReversePathFilter implements Filter {
    @Override
    public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain) throws IOException, ServletException {
        final HttpServletRequest req = (HttpServletRequest) request;
        final String requestURI = req.getRequestURI();

        if (!requestURI.endsWith("/")) {
            chain.doFilter(request, response);
        } else {
            final String servername = req.getServerName();
            final Domain domain = getDomain(servername);

            if (domain.hasSubdomain()) {
                final HttpServletRequestWrapper wrapped = wrapServerName(req, domain);
                wrapped.getRequestDispatcher(requestURI + domain.getSubdomainAsPath()).forward(wrapped, response);
            } else {
                chain.doFilter(request, response);
            }
        }
    }

    private Domain getDomain(final String domain) {
        final String[] domainParts = domain.split("\\.");
        String mainDomain;
        String subDomain = null;

        final int dpLength = domainParts.length;
        if (dpLength > 2) {
            mainDomain = domainParts[dpLength - 2] + "." + domainParts[dpLength - 1];

            subDomain = reverseDomain(domainParts);
        } else {
            mainDomain = domain;
        }

        return new Domain(mainDomain, subDomain);
    }
    private HttpServletRequestWrapper wrapServerName(final HttpServletRequest req, final Domain domain) {
        return new HttpServletRequestWrapper(req) {
            @Override
            public String getServerName() {
                return domain.getMaindomain();
            }
            // more changes? getRequesetURL()? ...?
        };
    }

    private String reverseDomain(final String[] domainParts) {
        final List<String> subdomainList = Arrays.stream(domainParts, 0, domainParts.length - 2)//
                .collect(Collectors.toList());

        Collections.reverse(subdomainList);

        return subdomainList.stream().collect(Collectors.joining("."));
    }

    @Override
    public void init(final FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void destroy() {
    }
}

这是Domain类：

public static class Domain {
    private final String maindomain;
    private final String subdomain;

    public Domain(final String maindomain, final String subdomain) {
        this.maindomain = maindomain;
        this.subdomain = subdomain;
    }

    public String getMaindomain() {
        return maindomain;
    }

    public String getSubdomain() {
        return subdomain;
    }

    public boolean hasSubdomain() {
        return subdomain != null;
    }

    public String getSubdomainAsPath() {
        return "/" + subdomain.replaceAll("\\.", "/") + "/";
    }
}

而且您需要一个能够捕获所有内容的控制器

@RestController
public class CatchAllController {

    @RequestMapping("**")
    public FileSystemResource deliver(final HttpServletRequest request) {
        final String file = ((String) request.getAttribute(HandlerMapping.PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE));

        return new FileSystemResource(getStaticFile(file));
    }

    private File getStaticFile(final String path) {
        try {
            // TODO handle correct
            return new File(CatchAllController.class.getResource("/static/" + path + "/index.html").toURI());
        } catch (final Exception e) {
            throw new RuntimeException("not found");
        }
    }
}

我不确定是否有必要重写中的其他方法HttpServletRequestWrapper。这就是发表评论的原因。

另外，您还必须处理文件传递的情况（不存在，…）。